diff --git a/api/@ohos.distributedHardware.mechanicManager.d.ts b/api/@ohos.distributedHardware.mechanicManager.d.ts
index 393736224823c1c8f5ed080689502e1b2ec84403..5d7c7301693ae5d33292e9ccaa1149bada27d8ad 100644
--- a/api/@ohos.distributedHardware.mechanicManager.d.ts
+++ b/api/@ohos.distributedHardware.mechanicManager.d.ts
@@ -302,6 +302,23 @@ declare namespace mechanicManager {
      */
     function off(type: 'rotationAxesStatusChange', callback?: Callback<RotationAxesStateChangeInfo>): void;
 
+    /**
+     * Searching for a specified target.
+     *
+     * @param { TargetInfo } target - Target infomation.
+     * @param { SearchParams } params - Parameters to use when searching.
+     * @returns { Promise<SearchResult> } Promise that return the Search result.
+     * @throws { BusinessError } 202 - Not system application.
+     * @throws { BusinessError } 33300001 - Service exception.
+     * @throws { BusinessError } 33300002 - Device not connected.
+     * @throws { BusinessError } 33300003 - Feature not supported.
+     * @throws { BusinessError } 33300004 - Camera not opened.
+     * @syscap SystemCapability.Mechanic.Core
+     * @systemapi
+     * @since 21
+     */
+    function searchTarget(target: TargetInfo, params: SearchParams): Promise<SearchResult>;
+
     /**
      * Mechanical device information.
      * @typedef MechInfo
@@ -693,6 +710,64 @@ declare namespace mechanicManager {
         mechInfo: MechInfo,
     }
 
+    /**
+     * Target information.
+     *
+     * @typedef TargetInfo
+     * @syscap SystemCapability.Mechanic.Core
+     * @systemapi
+     * @since 21
+     */
+    export interface TargetInfo {
+        /**
+         * Target type.
+         * @type { TargetType }
+         * @syscap SystemCapability.Mechanic.Core
+         * @systemapi
+         * @since 21
+         */
+        targetType: TargetType;
+    }
+
+    /**
+     * Parameters for target searching.
+     *
+     * @typedef SearchParams
+     * @syscap SystemCapability.Mechanic.Core
+     * @systemapi
+     * @since 21
+     */
+    export interface SearchParams {
+
+        /**
+         * Search direction.
+         * @type { SearchDirection }
+         * @syscap SystemCapability.Mechanic.Core
+         * @systemapi
+         * @since 21
+         */
+        direction: SearchDirection;
+    }
+
+    /**
+     * Search result.
+     *
+     * @typedef SearchResult
+     * @syscap SystemCapability.Mechanic.Core
+     * @systemapi
+     * @since 21
+     */
+    export interface SearchResult {
+        /**
+         * Search result. Returns the number of targets found.0 means not found.
+         * @type { number }
+         * @syscap SystemCapability.Mechanic.Core
+         * @systemapi
+         * @since 21
+         */
+        targetCount: number;
+    }
+
     /**
      * Enumerates the user operations.
      * @enum { number }
@@ -875,6 +950,57 @@ declare namespace mechanicManager {
         RIGHT = 3
     }
 
+    /**
+     * Target type.
+     *
+     * @enum { int }
+     * @syscap SystemCapability.Mechanic.Core
+     * @systemapi
+     * @since 21
+     */
+    export enum TargetType {
+        /**
+         * human Face type.
+         * @syscap SystemCapability.Mechanic.Core
+         * @systemapi
+         * @since 21
+         */
+        HUMAN_FACE = 0
+    }
+
+    /**
+     * Search direction.
+     *
+     * @enum { int }
+     * @syscap SystemCapability.Mechanic.Core
+     * @systemapi
+     * @since 21
+     */
+    export enum SearchDirection {
+        /**
+         * System Default Direction.
+         * @syscap SystemCapability.Mechanic.Core
+         * @systemapi
+         * @since 21
+         */
+        DEFAULT = 0,
+
+        /**
+         * Leftward direction. Also indicates clockwise direction.
+         * @syscap SystemCapability.Mechanic.Core
+         * @systemapi
+         * @since 21
+         */
+        LEFTWARD = 1,
+
+        /**
+         * Rightward direction. Also indicates the counterclockwise direction.
+         * @syscap SystemCapability.Mechanic.Core
+         * @systemapi
+         * @since 21
+         */
+        RIGHTWARD = 2,
+    }
 }
 
 export default mechanicManager;
\ No newline at end of file
diff --git a/api/device-define/default.json b/api/device-define/default.json
index 5cd750e6f2a4187df68c7595f855dcf9780279f0..643653f37368beecafca0e04bdfa3fbe45bedfdb 100644
--- a/api/device-define/default.json
+++ b/api/device-define/default.json
@@ -234,6 +234,7 @@
     "SystemCapability.Ability.AppExtension.PhotoEditorExtension",
     "SystemCapability.Resourceschedule.BackgroundProcessManager",
     "SystemCapability.Test.PerfTest",
-    "SystemCapability.ResourceSchedule.SystemLoad"
+    "SystemCapability.ResourceSchedule.SystemLoad",
+    "SystemCapability.Mechanic.Core"
   ]
 }
diff --git a/api/device-define/tablet.json b/api/device-define/tablet.json
index d14d531849b7ae870b273c9ca1d33b477a8cd65b..551ead7491490cb43b365289b2da82c6e39199f4 100644
--- a/api/device-define/tablet.json
+++ b/api/device-define/tablet.json
@@ -226,6 +226,7 @@
     "SystemCapability.Resourceschedule.BackgroundProcessManager",
     "SystemCapability.Test.PerfTest",
     "SystemCapability.DistributedHardware.DistributedHardwareFWK",
-    "SystemCapability.ResourceSchedule.SystemLoad"
+    "SystemCapability.ResourceSchedule.SystemLoad",
+    "SystemCapability.Mechanic.Core"
   ]
 }